well you could have an unranked single games mode and a ranked match modejust make the laddering "bulkier".
Just say Legends' nameAlthough I will say I am currently playing another CCG while I wait. They have THE BEST laddering system IMO You never lose your rank like in Hearthstone..instead you go to a sub area of your rank, and fight out of it.
Having too many game modes can sometimes just water down the game and it takes up development time. But that is definitely an option! It could be a good game mode but i agree, I would also much rather have a arena/draft mode first. It's so much fun. well you could have an unranked single games mode and a ranked match mode
the main thing it adds it a sideboard to gwent and that's super interesting, it was just an idea. I would much rather see a draft mode or an arena like mode 1st.